Rotary cutter



(No Model.)

J. F. FREEMAN.

ROTARY CUTTER.

No. 388,549. Patented Aug. 28, 1888.

UNITED STATES PATENT OFFICE.

JAMES F. FREEMAN, OF LAWRENCE, ASSIGNOR TO JAMES W. BROOKS, TRUSTEE, OFCAMBRIDGE, MASSACHUSETTS.

ROTARY-CUTTER.

SPECIFICATION forming part of Letters Patent No. 388,549, dated August28, 1888.

Application filed March 2!), 1888. Serial No. 268,851. (No model.)

To all whom it may concern:

Be it known that 1, JAMES F. FREEMAN, of Lawrence, in the county ofEssex and State of Massachusetts, have invented an Improvement in RotaryCutters, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

This invention relates to rotary cutters, especially' adapted, amongotherthings, to be used in trimming the sole edges of boots or shoes, ithaving for its object to provide a cutter in which the knives, as theyare shortened by grinding, will automatically adjust themselves intocorrect operative position by the engagement of the knives with thework.

'My improved rotary cutter is adapted to trim the fore parts of boots orshoes, as well as to rand the heel. In accordance with my invention theknives, preferably two or more, are pivoted upon pivots parallel to theaxis of rotation of the trimmer-shaft. As herein shown, the blades arecarried by arms of a hub constituting a cutter carrier or head, which inpractice is mounted on a rotating shaft of a boot or shoe trimmingmachine.

The outer face of each knife or cutting-blade is of convex shape, andprovided at one edge or side with a flange, which in practice engages astop (preferably a lip or flange) on a rand-guard, herein shown as adisk or plate fitted upon the hub referred to.

My invention therefore consists, essentially, in a rotary cntter,.of arand-guard having a flange or stop and a cutter carrier or head,combined with a knife or blade pivoted to the carrier or head, theflange or stop determining the correct working position of the blades,substantially astwill be described.

Figure 1 is a plan or top view of a rotary cutter embodying myinvention, the guard employed therewith when heels are to be trimmedbeing omitted; Fig. 2, a top or plan view of the cutter turnedcompletely over from the position shown in Fig. 1, the heelguard beingshown; Fig. 3, a side or edge view of the cutter shown in Fig. 2,withone of the knives broken out to more clearly show the manner of securingthe knives to the cutterhead; and Figs. 4 and 5, modifications to bereferred to.

Referring to Fig. 1, the cutter carrier or head, herein shown as a hub,a, which in practice is adapted to be mounted on a shaft, a, of

a boot or shoe trimming machine of any usual or well-knownconstruction,is provided, as herein shown, with three sets of radialarms, a, to which are pivoted knives or cutting-blades a Each knife orcutting-blade of, as shown in Figs. 1 and 8, is provided with an ear orlug, a, extended between the forked or bifurcated ends of the arms a,(see Fig. 8,) the said knife being pivoted to the said arms by athreaded bolt or screw, a, extended through holes in the arm a and theear or lug a. The outer face of each knife or blade is convexed or madein the are of a circle, and

each blade at its side or edge is shown as pro herein shown as a lip orflange, b, on a disk or plate, b, fitted upon or connected to the hub a,the said disk or plate constituting a rand-guard by which the upper isprotected from the knives when the latter act to trim the fore part orsole-edge of a boot or shoe.

To prevent the knives from cutting ortrimming the heel when the rand isbeing trimmed, a guard is provided, it being shown as a disk or plate,(amounted upon the hub a on the side of the knives opposite to themudguard.

Instead of pivoting the knives or blades directly to the arms a, eachknife may be fitted or dovetailed into a channel or groove, 0', (seeFig. 5,) in a lug, 0 secured to the said arms by a screw or bolt, a.ting-edge of each knife, when the latter is in its operative positionwith the flange Z) in engagement with the lip b, is eccentric to its owncenter or pivot, but remains concentric to the hub or the shaft uponwhich the cutter is mounted. After the knives have become dulled the hubmay be taken from the shaft and the knives ground in usual or well-knownmanner. With my-improved cutter especial care is not required in thegrinding, for when V the rand-guard is again fitted on the hub a theoutward movement of the cutting-edges of the knives is limited by thelip. The posi- In practice the cut ssase tion occupied by the ontturnedblades will In testimony whereofl hzivesigned myname io be determined bythe lip b. to this specification in thepresencc of two sub I claimscribing witnesses. In a rotary cutter, a rand-guard having a 5 flangeor stop and a cutter carrier or head, JAMES F. FREEMAN.

combined with a .pivoted knife or blade, the said flange or stopdetermining the correct working position of the blades, substantially asdescribed. 7

itn esses:

Gno. H. HULL, HENRY F. HOPKINS.

